Earplug



FIG. 1 is a front, top perspective view of an earplug showing my new design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown on the drawings depict portions of the earplug that form no part of the claimed design. 

CLAIM The ornamental design for an earplug, as shown and described. 